Department of Radiology, National Naval Medical Center, Bethesda, Maryland (DJF); Department of Radiology and Nuclear Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland (DJF, MDM); Department of Radiologic Pathology, Armed Forces Institute of Pathology, Washington, DC (MDM); and Department of Radiology, University of Maryland School of Medicine, Baltimore, Maryland (MDM)